Just 5 分钟！使用 k3s 部署轻量 Kubernetes 集群快速教程

$ openstack server list+--------------------------------------+-------------------+---------+-----------------------------------+-----------+-----------+| ID                                   | Name              | Status  | Networks                          | Image     | Flavor    |+--------------------------------------+-------------------+---------+-----------------------------------+-----------+-----------+| 4df6a6dc-26e8-4ae0-8b6e-2f97daec0ef3 | k3s-master        | ACTIVE  | private=10.10.1.159               | Debian-10 | m1.tiny   || 5ca13239-b745-4f62-ab11-0a27949c9b35 | k3s-node02        | ACTIVE  | private=10.10.1.142               | Debian-10 | m1.tiny   || a54997f2-4d94-4718-86ab-73609b328761 | k3s-node01        | ACTIVE  | private=10.10.1.126               | Debian-10 | m1.tiny   |+--------------------------------------+-------------------+---------+-----------------------------------+-----------+-----------+

sudo tee -a /etc/hosts<<EOF10.10.1.159 k3s-master10.10.1.126 k3s-node0110.10.1.142 k3s-node02EOF

curl -sfL https://get.k3s.io | sh -

[INFO]  Finding latest release[INFO]  Using v0.8.1 as release[INFO]  Downloading hash https://github.com/rancher/k3s/releases/download/v0.8.1/sha256sum-amd64.txt[INFO]  Downloading binary https://github.com/rancher/k3s/releases/download/v0.8.1/k3s[INFO]  Verifying binary download[INFO]  Installing k3s to /usr/local/bin/k3s[INFO]  Creating /usr/local/bin/kubectl symlink to k3s[INFO]  Creating /usr/local/bin/crictl symlink to k3s[INFO]  Creating /usr/local/bin/ctr symlink to k3s[INFO]  Creating killall script /usr/local/bin/k3s-killall.sh[INFO]  Creating uninstall script /usr/local/bin/k3s-uninstall.sh[INFO]  env: Creating environment file /etc/systemd/system/k3s.service.env[INFO]  systemd: Creating service file /etc/systemd/system/k3s.service[INFO]  systemd: Enabling k3s unitCreated symlink /etc/systemd/system/multi-user.target.wants/k3s.service → /etc/systemd/system/k3s.service.[INFO]  systemd: Starting k3s

$ systemctl status k3s● k3s.service - Lightweight Kubernetes   Loaded: loaded (/etc/systemd/system/k3s.service; enabled; vendor preset: enabled)   Active: active (running) since Tue 2019-09-17 19:20:00 UTC; 2min 24s ago     Docs: https://k3s.io  Process: 833 ExecStartPre=/sbin/modprobe br_netfilter (code=exited, status=0/SUCCESS)  Process: 836 ExecStartPre=/sbin/modprobe overlay (code=exited, status=0/SUCCESS) Main PID: 837 (k3s-server)    Tasks: 98   Memory: 571.1M   CGroup: /system.slice/k3s.service           ├─ 837 /usr/local/bin/k3s server KillMode=process           ├─ 851 containerd -c /var/lib/rancher/k3s/agent/etc/containerd/config.toml -a /run/k3s/containerd/containerd.sock --state /run/k3s/conta           ├─1110 containerd-shim -namespace k8s.io -workdir /var/lib/rancher/k3s/agent/containerd/io.containerd.runtime.v1.linux/k8s.io/f6eeb59978           ├─1127 /pause           ├─1207 containerd-shim -namespace k8s.io -workdir /var/lib/rancher/k3s/agent/containerd/io.containerd.runtime.v1.linux/k8s.io/0baf0ca181           ├─1225 /coredns -conf /etc/coredns/Corefile           ├─1576 containerd-shim -namespace k8s.io -workdir /var/lib/rancher/k3s/agent/containerd/io.containerd.runtime.v1.linux/k8s.io/dcce4b7e17           ├─1594 /pause           ├─1599 containerd-shim -namespace k8s.io -workdir /var/lib/rancher/k3s/agent/containerd/io.containerd.runtime.v1.linux/k8s.io/50816ffba8           ├─1617 /pause           ├─1824 containerd-shim -namespace k8s.io -workdir /var/lib/rancher/k3s/agent/containerd/io.containerd.runtime.v1.linux/k8s.io/d0ff393609           ├─1842 /bin/sh /usr/bin/entry           ├─1882 containerd-shim -namespace k8s.io -workdir /var/lib/rancher/k3s/agent/containerd/io.containerd.runtime.v1.linux/k8s.io/046779175f           ├─1899 /bin/sh /usr/bin/entry           ├─1904 containerd-shim -namespace k8s.io -workdir /var/lib/rancher/k3s/agent/containerd/io.containerd.runtime.v1.linux/k8s.io/93f0fe2361           └─1921 /traefik --configfile=/config/traefik.toml
Sep 17 19:20:34 deb10 k3s[837]: E0917 19:20:34.714229     837 daemon_controller.go:302] kube-system/svclb-traefik failed with : error storing statuSep 17 19:20:34 deb10 k3s[837]: E0917 19:20:34.719452     837 daemon_controller.go:302] kube-system/svclb-traefik failed with : error storing statuSep 17 19:20:34 deb10 k3s[837]: I0917 19:20:34.726816     837 reconciler.go:207] operationExecutor.VerifyControllerAttachedVolume started for volumSep 17 19:20:34 deb10 k3s[837]: I0917 19:20:34.726836     837 reconciler.go:207] operationExecutor.VerifyControllerAttachedVolume started for volumSep 17 19:20:34 deb10 k3s[837]: I0917 19:20:34.726857     837 reconciler.go:207] operationExecutor.VerifyControllerAttachedVolume started for volumSep 17 19:20:34 deb10 k3s[837]: I0917 19:20:34.726869     837 reconciler.go:207] operationExecutor.VerifyControllerAttachedVolume started for volumSep 17 19:20:35 deb10 k3s[837]: I0917 19:20:35.529102     837 reconciler.go:181] operationExecutor.UnmountVolume started for volume "helm-traefik-tSep 17 19:20:35 deb10 k3s[837]: I0917 19:20:35.542858     837 operation_generator.go:799] UnmountVolume.TearDown succeeded for volume "kubernetes.iSep 17 19:20:35 deb10 k3s[837]: I0917 19:20:35.629277     837 reconciler.go:285] Volume detached for volume "helm-traefik-token-kjwrl" (UniqueName:Sep 17 19:20:36 deb10 k3s[837]: W0917 19:20:36.355273     837 pod_container_deletor.go:75] C

$ cat /etc/rancher/k3s/k3s.yamlcat: /etc/rancher/k3s/k3s.yaml: Permission denieddebian@deb10:~$ sudo cat /etc/rancher/k3s/k3s.yamlapiVersion: v1clusters:- cluster:    certificate-authority-data: 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    server: https://localhost:6443  name: defaultcontexts:- context:    cluster: default    user: default  name: defaultcurrent-context: defaultkind: Configpreferences: {}users:- name: default  user:    password: 2d99cae31c075743be704bb717ceaae8    username: admin

$ sudo cat /var/lib/rancher/k3s/server/node-tokenK1042e2f8e353b9409472c1e0cca8457abe184dc7be3f0805109e92c50c193ceb42::node:c83acbf89a7de7026d6f6928dc270028

k3s_url="https://k3s-master:6443"k3s_token="K1042e2f8e353b9409472c1e0cca8457abe184dc7be3f0805109e92c50c193ceb42::node:c83acbf89a7de7026d6f6928dc270028"curl -sfL https://get.k3s.io | K3S_URL=${k3s_url} K3S_TOKEN=${k3s_token} sh -

[INFO]  Finding latest release[INFO]  Using v0.8.1 as release[INFO]  Downloading hash https://github.com/rancher/k3s/releases/download/v0.8.1/sha256sum-amd64.txt[INFO]  Downloading binary https://github.com/rancher/k3s/releases/download/v0.8.1/k3s[INFO]  Verifying binary download[INFO]  Installing k3s to /usr/local/bin/k3s[INFO]  Creating /usr/local/bin/kubectl symlink to k3s[INFO]  Creating /usr/local/bin/crictl symlink to k3s[INFO]  Creating /usr/local/bin/ctr symlink to k3s[INFO]  Creating killall script /usr/local/bin/k3s-killall.sh[INFO]  Creating uninstall script /usr/local/bin/k3s-agent-uninstall.sh[INFO]  env: Creating environment file /etc/systemd/system/k3s-agent.service.env[INFO]  systemd: Creating service file /etc/systemd/system/k3s-agent.service[INFO]  systemd: Enabling k3s-agent unitCreated symlink /etc/systemd/system/multi-user.target.wants/k3s-agent.service → /etc/systemd/system/k3s-agent.service.[INFO]  systemd: Starting k3s-agent

$ sudo kubectl config get-clusters NAMEdefault
$ sudo kubectl cluster-info Kubernetes master is running at https://localhost:6443CoreDNS is running at https://localhost:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy
$ sudo kubectl get  nodesNAME         STATUS   ROLES    AGE     VERSIONk3s-master   Ready    master   14m     v1.14.6-k3s.1k3s-node01   Ready    worker   3m11s   v1.14.6-k3s.1k3s-node02   Ready    worker   3m58s   v1.14.6-k3s.1
$ sudo kubectl get namespacesNAME              STATUS   AGEdefault           Active   16mkube-node-lease   Active   16mkube-public       Active   16mkube-system       Active   16m
$ sudo  kubectl get endpoints -n kube-systemNAME       ENDPOINTS                                  AGEkube-dns   10.42.0.2:53,10.42.0.2:53,10.42.0.2:9153   14mtraefik    10.42.0.5:80,10.42.0.5:443                 14m
$ sudo kubectl get pods -n kube-systemNAME                         READY   STATUS      RESTARTS   AGEcoredns-b7464766c-q9frk      1/1     Running     0          15mhelm-install-traefik-8dhpk   0/1     Completed   0          15msvclb-traefik-9c2j8          2/2     Running     0          4m49ssvclb-traefik-bf9zd          2/2     Running     0          4m2ssvclb-traefik-v2fpx          2/2     Running     0          14mtraefik-5c79b789c5-k589d     1/1     Running     0          14m

# Master$ sudo crictl psCONTAINER ID        IMAGE               CREATED             STATE               NAME                ATTEMPT             POD IDacfafb50852d3       18471c10e6e4b       16 minutes ago      Running             traefik             0                   bf8534452389ffee5ac7e88f2e       4a065d8dfa588       16 minutes ago      Running             lb-port-443         0                   e7068ff7ab2f2bbab5b07e5efb       4a065d8dfa588       16 minutes ago      Running             lb-port-80          0                   e7068ff7ab2f265c5d1333ea04       2ee68ed074c6e       16 minutes ago      Running             coredns             0                   435c51f4716fc
# Workers$ sudo crictl psCONTAINER ID        IMAGE               CREATED             STATE               NAME                ATTEMPT             POD ID7ad5c83d6466f       4a065d8dfa588       6 minutes ago       Running             lb-port-443         0                   bf8d9fe57c3f3c1380eabc0b33       4a065d8dfa588       6 minutes ago       Running             lb-port-80          0                   bf8d9fe57c3f3